EPIBOND® 420 A/B

EPIBOND® 420-A/B Epoxy Adhesive is a two-component, modified epoxy, room-temperature curing paste with high strength and toughness. It is suitable for a wide variety of metal, honeycomb, and fiber-reinforced composite bonding applications requiring high shear strength and good peel strength. EPIBOND® 420 A/B contains 5 mil (125 µm) spacer beads to provide the very uniform bond line required in high-stress areas. EPIBOND® 420 A/B structural epoxy adhesive replaces REDUX 410 NA epoxy adhesive and meets the requirements of BMS 5-107.

 

The information, specifications, and materials provided with this product are for general informational purposes only and are subject to change without notice. The product is provided “as is” without any warranties, express or implied, including but not limited to warranties of merchantability, fitness for a particular purpose, or non-infringement. Users are responsible for ensuring the product is suitable for their intended application and for following all applicable safety guidelines and instructions.

The information, specifications, and materials accessible here may not reflect the most current version. Please use the Request a Document feature for the most current product documentation available.

RTU Product Type: 2K (2 component) Adhesive, Epoxy Adhesive, Structural Adhesive

Product End Uses: Aerospace Applications, Composite Panel, Honeycomb Structure, Space Shuttle, Spacecraft

Material Compatibility: Composite Substrate, Metal Substrate

Product Features: Excellent Strength, Good Toughness, High Peel Strength, High Shear Strength, Resilient, Room Temperature Curing

Enhanced TDS

Identification & Functionality

Features & Benefits

Product Features
Features and Benefits
  • Structural Applications
  • Room Temperature Cure Paste
  • Extremely Tough and Resilient
Product Features
  • Structural Applications
  •  Room Temperature Cure Paste
  •  Extremely Tough and Resilient

Applications & Uses

Markets
Applications
Processing Information

Mix Ratio 

Products

Product Parts by weight

Epibond® 420 A Resin 100
Epibond® 420 B Hardener 40

 Material temperatures should be above 18°C (65°F) when mixing. Mix the resin and hardener at the above ratio thoroughly for 2-3 minutes to achieve a uniform color. Epibond® 420 A/B is available in a 50 mL twin cartridge, and for best results should be dispensed using manual or pneumatic dispensing equipment through a suitable mixing nozzle as shown below:

Static Mixing Nozzles

Width/Diameter (in)

Number of Elements

Nordson EFD Part #

Sulzer Mixpac Part #

0.20 20 7701830 N/A
0.21 21 7701453 MAH 05-21T


For other mixing and application recommendations, please consult your local Huntsman Advanced Materials representative or one of our distributors. 
 

Parameter Value
Gel time at 77°F, min 70
Typical Cure Cycles 7 days at 77°F or
90 min at 175°F or
Gel at RT + 2 hours at 140°F or
1 hour at 250°F

Material temperatures should be above 18°C (65°F) when mixing. Mix the resin and hardener at the above ratio thoroughly for 2-3 minutes to achieve a uniform color. Epibond® 420 A/B is available in a 50 mL twin cartridge, and for best results should be dispensed using manual or pneumatic dispensing equipment through a suitable mixing nozzle as shown below: 
 

Width/Diameter (in)

Number of Elements

Nordson EFD Part #

Sulzer Mixpac Part #

0.20 20 7701830 N/A
0.21 21 7701453 MAH 05-21T


For other mixing and application recommendations, please consult your local Huntsman Advanced Materials representative or one of our distributors.
 

Parameter Value
Gel Time at 77°F, min 70
Typical Cure Cycles 7 days at 77°F or
90 min at 175°F or
Gel at RT + 2 hours at 140°F or
1 hour at 250°F

Regulatory & Compliance

Technical Details & Test Data

Processing Condition

Material temperatures should be above 18°C (65°F) when mixing. Mix the resin and hardener at the above ratio thoroughly for 2-3 minutes to achieve a uniform color. EPIBOND® 420 A/B is available in a 50 mL twin cartridge, and for best results should be dispensed using manual or pneumatic dispensing equipment through a suitable mixing nozzle as shown below:

Static Mixing Nozzles

Width/Diameter, in Number of Elements Nordson EFD Part #

Sulzer Mixpac Part #

0.20 20 7701830 N/A
0.21 21 7701453 MAH 05-21T

 

Cured Properties

Unless otherwise stated, the data were determined with typical production batches using standard test methods. They are typical values only, and do not constitute a product specification. Samples were cured for one hour at 250°F. Testing was performed at 77°F (25°C) unless otherwise stated.
 

Property Key

Value

Unit

Test Method

Condition

Tensile Lap Shear Strength 4,500 psi ASTM D1002 at 25°C, Al-Al
Tensile Lap Shear Strength 500 psi ASTM D1002 at 82°C, Al-Al
Tensile Lap Shear Strength 300 psi ASTM D1002 at 82°C, Al-Al
Compressive Strength 6,400 psi ASTM D695 at 121°C, Al-Al
Compressive Strength 480 psi ASTM D695 at 25°C
Tensile Strength 5,200 psi ASTM D638 at 82°C
Tensile Modulus 238 ksi ASTM D638  
Elongation 4.2 % ASTM D638  
Flexural Strength 8,400 psi ASTM D790  
Flexural Modulus 277 ksi ASTM D790  
T-Peel, anodized and primed Aluminum 41 pli ASTM D3167

at 25°C, 11-mil (0.279 mm) bond thickness

Glass Transition Temperature 61 °C DMA, E’ onset  
Hardness 70 Shore D ASTM D2250  
Insert Shear Strength 1,500 psi BMS 5-107 As cured
Insert Shear Strength 1,400 psi BMS 5-107

As cured + 30 days at 140°F (60°C), 95% R.H.

Packaging & Availability

Packaging Type
Regional Availability
  • Americas
  • Asia Pacific

Storage & Handling

Storage Conditions
  • EPIBOND® 420-A/B Epoxy Adhesives should be stored in a dry place in the original sealed container at temperatures between 2°C and 40°C (36°F and 104°F).
  • Tightly reseal containers after each use. Under these storage conditions, the products have a shelf-life of 1 year (from date of manufacture).
  • The components should not be exposed to direct sunlight.
Storage Conditions
  • EPIBOND® 420 A/B Epoxy Adhesives should be stored in a dry place in the original sealed container at temperatures between 2°C and 40°C (36°F and 104°F).
  • Tightly reseal containers after each use.
  • Under these storage conditions, the products have a shelf-life of 1 year (from date of manufacture).
  • The components should not be exposed to direct sunlight.

Other

Material Compatibility
Physical Form
Product End Uses
Application Information
ValueUnitsTest Method / Conditions
Mix Ratio0.4%(W)Hardener : Resin
Physical Properties
ValueUnitsTest Method / Conditions
Density1.05g/cm³ASTM D792